Improvement in devices for cutting tenons on metallic rods



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C. JILLSON, OF WORCESTER, MASSACHUSETTS.

IMPROVEMENT IN DEVICES FOR CUTTINGTENONS ON METALLIC RODS, &c. I

To all lwhom 'it may concern:

Be it known that I, C. JILLSON, of- Worcester, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Machines for Outti ngTenons on Metal Rods, Bars,Wires, Tubes, 85e.; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanyin g drawings,'makin g a part of this speciication, in Which- Figure l represents a side view of the machine. Fig. 2represents an end view thereof. Fig. 3 represents a longitudinal verticalsection through the machine. Fig. 4. represents an end view and section of the eye through which the rod, bar, wire, or tube is introduced. Figs. 5, 7, and 8 represent different products, all made from the machine represented in the drawings. Fig. 6 represents a gage for cutting tenons on pipe-tubes and other hollow articles.

Similar letters of reference, where they occur in the several figures, denote like parts of the apparatus in all the drawings.

To enable others skilled in the art to make and use my invention, I will proceed to de scribe the same with reference to the drawings.

A is a stock having a shank, B, connected to it, by which it may be affixed to a mandrel to be rapidly revolved, as in a lathe. There is an opening, c, in the head of the stock, over the front of which a face-plate, C, is secured by screws I) b, so'that it may be removed when necessary. In the face-plate G there is an opening, into which a series of eyes, D, will lit and be secured by a set-screw, c, or otherwise, these eyes having openings through them of variable sizes, so as to suit the size of the thing that is to be introducedY through it to have a tenon cut thereon.

A cutter or cutting-tool, d, fits in a slot made in the stock, and its cutting-point is placed in a line leading directly to the center of the eye that is used, and remote from the center of said eye just half the diameter of the tenon to be out. This cutter is made adjustable by the set-screw e, while the same screw, together with the screw f, holds the cutter firmly in its adjusted position.

Inside of the stock there is a gage, g, madel adjustable by the set-screw It. This gage deines the length of the tenon that is being cut, and may be varied to suit the circumstances of the case, or removed and replaced by another, as may be desired.

The eye D steadies and centers the rod, wire, or other thing to be operated upon. The cutter d forms the tenon and shoulder, and the gage g defines the length of the tenon. Now, by changing the position of the cutter various sizes of tenons may be cut upon the same or upon differen t-sized wires. By shifting the gage g variable lengths of tenons may be made, and by changing the eye variable diameters of rods, wires, bars, Ste., may be introduced.

In Fig. 5 I have shown a tube or pipe, i, having tenons cut thereon, and, as will be seen by the sectional figures, it is immaterial how untrue the external diameter of the pipe or tube may be, the tenon will be cut parallel with its bore or interior surface of the pipe. To form the tenons on this tube or pipe I simply remove the eye D, using its seat as a guide, andinsert the mandrelj, Fig. 6, as a gage instead of the one g. The head of the mandrel is 'used for the greater bore of the tube and the body of it'for the lesser bore. In either case the mandrel, entering the bore of the tube, causes the cutter to work parallel to that bore regardless of the irregularities ofthe exterior of the tube and removing the excess of metal. k, Fig. 7, represents a portion of a square bar or piece of metal having a round tenon cut upon it, and perfectly centered. The several tenons, l 2 3 4. 5 6 7 8 9 10, herein represented, and varying in length or diameter, may all be out by the machine herein represented and with the greatest accuracy.

Having thus fully described the construction and operation of my machine for cutting tenons on metal rods, wires, bars, or tubes, what I claim therein as new, and desire to secure by Letters Patent, is-

The combination of the cutter, eye, and gage,

operating together, substantially in the manner and for the purpose described.

G. JILLSON. Witnesses:

OHAs. B. PRATT, JN0. G. DANA. 

